/*
 * yidingliu.com Inc. * Copyright (c) 2016 All Rights Reserved.
 */

package org.chris.quick.m.glide;
import android.content.Context;
import android.graphics.Bitmap;
import android.graphics.BitmapShader;
import android.graphics.Canvas;
import android.graphics.Paint;

import com.bumptech.glide.load.engine.bitmap_recycle.BitmapPool;
import com.bumptech.glide.load.resource.bitmap.BitmapTransformation;

/**
 * Description:圆形图片加载的处理工具
 * User: hzm
 * Date: 2016/9/280031
 * Time: 15:42
 */
public class GlideCircleTransform extends BitmapTransformation {
    public GlideCircleTransform (Context context ) {
        super(context);
    }

    @Override
    protected Bitmap transform ( BitmapPool pool, Bitmap toTransform, int outWidth, int outHeight ) {
        return circleCrop(pool, toTransform);
    }

    private static Bitmap circleCrop ( BitmapPool pool, Bitmap source ) {
        if (source == null) return null;

        int size = Math.min ( source.getWidth (), source.getHeight () );
        int x = (source.getWidth() - size) / 2;
        int y = (source.getHeight() - size) / 2;

        // TODO this could be acquired from the pool too
        Bitmap squared = Bitmap.createBitmap ( source, x, y, size, size );

        Bitmap result = pool.get ( size, size, Bitmap.Config.ARGB_8888 );
        if (result == null) {
            result = Bitmap.createBitmap ( size, size, Bitmap.Config.ARGB_8888 );
        }

        Canvas canvas = new Canvas ( result);
        Paint  paint  = new Paint ();
        paint.setShader (new BitmapShader ( squared, BitmapShader.TileMode.CLAMP, BitmapShader.TileMode.CLAMP) );
        paint.setAntiAlias(true);
        float r = size / 2f;
        canvas.drawCircle(r, r, r, paint);
        return result;
    }

    @Override public String getId () {
        return getClass().getName();
    }
}
